Choose the correct preposition: keen ___ learning

The correct preposition to use with "keen" in the phrase "keen ___ learning" is "on." This expression indicates a strong interest or enthusiasm for learning. In English, certain adjectives are commonly paired with specific prepositions, and "keen on" is one such collocation that conveys a positive and engaged attitude towards an activity.

When someone is described as "keen on learning," it signifies that they have a passionate desire to acquire knowledge or skills. This phrase is often used in educational contexts to highlight a student's eagerness to engage with new subjects or challenges. For instance, a student who is keen on learning may actively seek out additional resources, participate in discussions, and strive for academic excellence. Understanding this relationship between "keen" and its preposition is essential for mastering English nuances, particularly for those preparing for competitive exams.

In contrast, using other prepositions like "in," "at," or "for" in this context would not convey the same meaning. For example, "keen in learning" or "keen at learning" sounds awkward and is not standard usage. Similarly, "keen for learning" does not effectively communicate the intended enthusiasm. Therefore, it is crucial to remember the correct pairing, as it reflects a deeper understanding of English grammar and usage, which is vital for achieving success in competitive examinations.